Which Business Expenses Are Actually Deductible

Ordinary work clothes usually stay personal

Personal clothing is a classic trap. Looking professional for client meetings does not generally turn ordinary street clothing into a deductible uniform simply because you would not have bought it without the job.

Meals and entertainment need separate treatment

Business meals are generally subject to a 50% limitation under current Schedule C guidance, and entertainment is not automatically deductible because a client was present. Keep who, where, when, and business purpose with the receipt.

Split 2026 business mileage at July 1

Vehicle deductions require business-use support. In 2026 the IRS changed the standard business mileage rate midyear, so date-based mileage records matter if you use the standard method.

Allocate mixed-use phone and internet on a supportable basis

Home internet and phone plans often serve both business and personal use. Choose a reasonable allocation method and keep enough evidence to explain it rather than deducting 100% because the bill is paid from a business account.

Mixed-use costs need more than a receipt

'Ordinary and necessary' is the opening rule, not the entire deduction analysis. Some categories have percentage limits, capitalization rules, listed-property rules, or stronger substantiation requirements. A software subscription used only for client work may be straightforward. Ordinary street clothing usually is not deductible simply because you wear it on calls. Business meals are generally limited, and entertainment does not become deductible just because a client is present. Mixed-use phone and internet costs need a reasonable business allocation instead of automatically claiming the whole household bill.

Vehicle records deserve special attention in 2026. The IRS business mileage rate was 72.5 cents per mile for the first half of the year and increased to 76 cents per mile beginning July 1, so a mileage log needs trip dates, business purpose, and distance. A receipt or card charge proves only that you paid money; it does not establish why the expense belonged to the business or whether a limitation applies. For larger equipment purchases, ask whether depreciation or Section 179 treatment is relevant rather than forcing the charge into a normal expense line. Good bookkeeping stores the receipt together with the business-purpose note, allocation, and date.

Use the Schedule C categories as an index, not as permission. For each spending type, ask four questions: what was purchased, what business activity did it support, was any part personal, and what document proves the amount? Software used only for client work is easy. A phone plan, internet service, vehicle, travel day, or meal needs a business-use or business-purpose record. Ordinary street clothing is generally personal even if you prefer to wear it while working; specialized protective or required uniforms can raise different rules. Education is another fact-sensitive category because training that maintains or improves skills in an existing trade can be treated differently from education that qualifies someone for a new trade. Record the business purpose while the transaction is fresh instead of writing vague labels such as ‘marketing’ months later.

Separate current expenses from assets and special deduction regimes. A $40 monthly SaaS subscription does not require the same analysis as a $4,000 computer, furniture package, vehicle, or equipment with a useful life beyond the year. For larger purchases, save the invoice, placed-in-service date, financing terms, and business-use percentage so the preparer can evaluate depreciation, Section 179, bonus-depreciation rules, or other treatment for the specific year. For vehicles, choose a recordkeeping method that captures date, destination, miles, and business purpose; if using the standard mileage method, the 2026 rate changes at midyear, so dated trips matter. For meals or travel, identify who was involved and why the trip or meeting was business-related. A deduction file should tell the story of the expense without relying on the owner's memory.

Create a ‘needs allocation’ bucket instead of guessing mixed-use deductions during weekly bookkeeping. Phone, internet, shared software, vehicle costs, and home expenses can sit there temporarily with the receipt attached until you apply a documented business-use method. At month end, resolve the bucket and record the basis for the allocation. Also distinguish client-reimbursed costs: a reimbursed airfare or printing bill may affect income and expense reporting depending on the arrangement, so keep the reimbursement tied to the original cost and contract. If a customer pays you a lump sum that includes expenses, do not silently net the two in the bank feed. Clear records make it easier for a CPA to determine the correct tax treatment and to defend why a particular portion was business-related.

Expense review before you close the month

1. Use Schedule C categories as a starting map.
2. Write business purpose on ambiguous receipts.
3. Separate personal and mixed-use portions.
4. Keep mileage by date and purpose.
5. Flag large equipment purchases for depreciation review.

Expense questions that prevent bad deductions